Welding-torch.



J. G. GEHRING, JR. 8: R. D. GON BAD.

WELDING TOBGH.

APPLIOATIOH FILED AUG; 11, 1013.

Patented Nov. 11, 1913.

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UNITED STATES PATENT OFFICE.

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flnwilwfion e1 limreletmt- PatentedNov. 11, 1913.

Jr., and RIoHAiu) D. CONRAD, citizens of the United States, and residing in the city ofi Pittsbur h, in the county of Allegheny and State of ennsylvania, have invented or discovered new and useful Improvements in Weldin -Torches, of which the following is a s eci' cation.

ur invention comprises new and useful improvements in welding torches inwhich oxygen and acetylene or other gases are used.

'ore particu arly it consists in new and improved means for regulating thesupply and proportions/of the gases, whereby its operator may control the latter with the hand which holds the torch.

Our invention consists also in a new and improved head whereby the tip may be ad uSted' at an angle most convenient for the work inhand.

Other novel features of structure and 'arline IV-IV in- Fig. 1, the pivot-stud.

rangement of parts will appear from the following description.

In the accompanying drawings, Figure 1 is a side elevation of our improved torch, the tip being shown broken away at the end; Fig. 2 is an enlarged longitudinal section of the. same; Fig, 3 is a sectional view of the head and tip, the tip being shown for the entire length; Fig. 4 is a section along, the

em shown in full; Fig. 5, is a cross section along the line V'V in F ig; 2 and Fig.v 6 is a side elevation of a torch aving a fixed head".

For the sake of. illustration the gas tubes B and" C and the. threaded holes 2'and 3 are shownturned 90 from their positions in Fig.2. he following: is'a detailed descriptiom of the drawings-,. reference bemgfi'rst had to and QI-ibr theatt'achmento the usu Figs. 1, 2, 3, 4!,and 5: A is a clindrical casmg onev end of which is closed y a plug 1 having formed in its outer. end two threaded holes 2 and 3 whose. inner ends connect respectively into bores 4 and 5 extending to. the. mner end. of said plug. The diameter of saidlbores is less than that of the threaded holes 2 and. 3 and at the junctunes of said holes andi bores are formed tapered valve. seats 6 and'l'l'. Into the holes 2 and? anescrewed'tlieta and con 8 tubes for the supply of acetylene and oxy n respectively. 10,11. men-pair. of 1*. ve ateuu-movafilelmglt-udmally withinmlflii g 1in place on casing I the tube B whi flexible kpplication filed August 11', 1913; Sula-PRO. 784,059.

A. and havin their ends extending respectively throng the bores 4' and 5. The end oi stem 10' is provided with a tapered valve .head 12 to coact with. the valve seat 6' while v the end of stem 11' is provided with a similar valve head 13 to coact'with seat 7 From thebore 45 a lateral passage 14 leads through the dglug 1 to an acetylene tube B which exten through the casing A while a similar lateral passage 15 (Fig. 6 "leads from the bore 5 to the oxygen tube It is thus evident that b moving the proper valve stem Longitudina ly the supply of oxygen to tube C or of acetylene to tube B may be cut ofi or nicely adjusted and controlled. D and E are a pair of guide members mounted in tandem in the interior of casing A: The mem Iber D is provided with a stud 16 which engages a longitudinal slot 17 in the casing A while the member E is provided with a simi- "lar stud 18 which engages a similar slot .19 in casing A. Said guide members are spaced apart so as not to interfere with each others movement. It is evident that .said guidemembers are capable of longitudinal movement only, in said casing. The member D is provided with an inwardly ex- ;t'ending pierced lug 20 through which the f reduced threaded end of stem 10 extends, a

.nut 21 being provided to screw up against said lug to regulate the effective length of stem 10'. The member E is provided with a similar lug 22 through which the reduced threaded end of the stem 11 extends to be engaged by a nut 23; F'and G are a pair of Qrotar'y hand grasp-collars. mounted on e *casing A and revented from longitudinal .movement by rings 24' which are held rigidly A as by set screws 25. The grasp F is provided with an oblique slot 26 which isengaged by the stud 16 of member Daand thegtasp G is provid'ed with a similar oblique 0t 27 whlch is engaged :by the stud 180i the member E. It. 1s thus I evident that by rotating. the grasp F the ;member D may be moved longitudinally .thus regulating the admission of the gaszto e the rotation of the grasp G Lmoves member. E' longitudinally and regu- .la'tes the. admissionof. the gas to tube. C.

:The tubes B and are brought together at other end of casi I A; and enter the .smaller casingH whose; utt is fixed in the lhg.28 in theendlof'casin Said tubes and (intend-through casing; H and 'aroiprefeubly theret at hothenda.

to obtain the proper stiffness. The outer ends of the tubes are joined integrally with the tapered pivot stud I provided with an extended base 29. Said stud I is provided 5 with two spaced apart circumferential groovesor channels 30 and 31, the former being nearer the base 29 and the larger of the two. The tube B communicates with the groove 30 by means of a passage 32 in the body of the pivot stud and a smaller passage 33 connects the tube C with the groove 31. The head J is provided with a tapered bore 34 which engages the pivot stud I and is held thereon by means of countersunk washer 35 and a nut 36 seated in said washer and engaging the reducedthreaded end of said pivot stud. The bore 34 is provided with a large cicumferential groove or depression 37 which registers with the groove 30 of the pivot stud and a smaller circumferential groove or depression 38 which registers with the groove 31 of the pivot stud. The head J is provided with a second bore 39 at right angles to bore 34. The butt end of said bore 39 is internally threaded to receive the threaded perimeter of a bushing 40. The threaded portion of bore 39 is provided with a cicumferential groove 41 which communicates by a passage 42 with the groove 38 of the bore 34 and the bushing 40 is provided with a port 43 which admits the gas from the groove 41 into the interior of the bushing. The forward por tion of bore 39 is of reduced diameter and is a sliding fit for the butt end of the tip K which screws into the open end of bushing 40, the interior of the bushing being threaded for that purpose. The bore 39 is provided with a circumferential groove 44 which surrounds the tip K and communicates by means of a pass e 45 with the circumferential groove 37 o bore 34 and the tip K is provided with a lateral port 46 which leads from said groove 44 into the en- 45 largedbore 47 of said tip. 48 is a reducing injector-nipple or jet screwed into the threaded interior of the butt of said tip K and extending past the port 46. The bore of said tip K is reduced as at 49 in front of 50 nipple 48 and then gradually expands to the end of said tip into which is screwed the removable nozzle L. It is evident that the acetylene or other gas will enter through the tube B, passage 32 groove 30 passage 45,

groove 44 and port 46 into the enlarged bore 47 of the ti K. The oxygen or other gas will enter t rough the tube C, passage 33, groove 31, passage 42 groove 41 and port 43, into the interior of the bushing 40 thence passing through the injector nipple 48 into the bore of. the tip. The oxygen being at eater pressure than the aceliylene in ects t e same from the tube B. that by loosening the nut 36, the head J may be swung at any convenient angle to t is evident the stock of the torch and held in its adjusted position by tightening said nut.

In the case of Fig. 6 we have shown a fixed or stationary head, the outer end of casing H being integral with the head J. The acetylene tube B communicates by a passage 45 with the groove 44 in the bore 39 of the head while the oxygen tube C communicates by a passage 42 with the groove 41 of the bore 39. The mounting of the tip K in the bore 39 is the same as that described in connection with Fig. 3.

The advantage of threading the tip K into the bushing 40 instead of directly into the head is that the frequent change of tips to suit various thicknesses of metal and different uses is liable to wear out the receiving thread. Thus when the internal thread of a bushing is destroyed, a new bushing may be substituted in a moment and the torch made as good as new. Otherwise an entire new head or in the case of a solid headed torch, an entire new torch would be required.

By means of the hand grasp the quantity of gas may be regulated with the hand holding the torch, thus greatly simplifying and facilitating the use of the torch. The valves open against pressure in the couplings 8 and 9 so that excess pressure in thefiexible connecting tubes will not tend to open the valves but will really have the opposite effect which will be counteracted by the friction of the controlling mechanism and the ressure of the hand against the grasps.

' at we desire to claim is 1. In a torch, a head, a tube communicating with said head for the supply of gas thereto, a casing surrounding said tube and forming the handle of said torch, a movable grasp-collar mounted on said casing, a valve controlling the supply of gas to said tube, and connecting means between said valve and said collar whereby the adjustment of said valve is effected bythe movement of said collar on said casing. 2. In a torch, a head, a tube communicatlng with said head for the supply of gas thereto, a casing surrounding said tube and forming the handle of said torch, a movable grasp-collar mounted on said casing, a valve controlling the supply of gas to said tube and openin against pressure, and connecting means etween sald valve and said'collar whereby the adjustment of said valve is effected by the movement of said collar on said casing.

3. In a torch, a head, a tube communicating with said head for'the supply of gas thereto, a casing surrounding said tube and formin the handle of said torch, a valve contro ing the supply of gas to said tube,

a member mounted 1n said casing and sliding longitudinally therein and operatively connected Wlth said valve to control the 0 same, a rotary grasp-collar mounted on said valve opening against pressure and controlthereto, a casing surrounding said tube and ling the supply of gas to said tube, a memher mounted in said casing and sliding longitudinally therein, and operatively connected with said valve, a rotary graspcollar mounted on said casing, and means whereby the rotation of said collar imparts longitudinal motion to said member.-

5. In a'torch, a head, a tube communicating with said head for the supply of gas thereto, a casing surrounding said tube and forming the handle of said torch, said casing being provided with a longitudinal slot, a rotary grasp-collar mounted on'said casing and provided with an oblique slot intersecting said first slot, a valve controlling the supply of gas to said tube, a member slidingl mounted in said casing and operative y connected with said valve to control the latter, and a stud projecting from said member and engaging both of said slots.

6. In a torch, a head, a tube communicating with "said head for the supply of gas forming the "handle of said torch, said casing being provided with a longitudinal slot, a rotary grasp-collar mounted on said casing and provided with an oblique slot intersecting said first slot, a plunger valve controlling the supply of gas to said tube,

a member slidingly mounted in said casing and secured to'the stem of said valve, and

a stud projecting from said member and en-- gagin both of, said slots.

7 a torch, a head having an open bore, a bushing having a closed outer end screwed into one end of said bore, a tip extending into the other end of said bore and screwed into said bushing, means for supplying a gas to the interior of said tip, and means for supplying a second gas to the interior of said bushing.

8. In a torch, a head havlng an open bore and passages for the admission of oxygen and acetylene or other ases to said bore;i

a bushing having a closed outer end screwe into one end of said here and provided with a lateral port for the admission of one of said gases to-the interior of said bushing, and a tip extending into the other end of said bore and screwed into the open end of said bushing, said tip being provided with a lateral port for the admission of the other of said gases to said ti 9. In a torch, a.;-he'ad l1aving an open bore and passages-for-the admission of gases to said bore, a bushing having a closed outer end screwed into one end of said bore and provided witha lateral-port for the admission of one of. said gases to the interior of said bushing,avtipextending into the other end of; said bore and screwed into the open end ofsaiid bushing, said tip being pro-' videdwith, a lateral p'ortffor the admission of the. other of said gases to said tip, and meansflier/feeding and restrictin the gas from the bushing to the tip past t e lateral port inj'the tip, whereby the last'named gas is injected into the tip. p

10. In atorch, gas conducting tubes, a

ivot stud rigidlyattached to saidtubes and having passages connecting with the same, a head havinga bore in which said stud is adapted" to be mounted, said'head being pro vided with a second bore atvan angle to said firstbore andfsaid head being provided with passages connecting said bores, and a tip mounted in said second bore and adapted to receive'the gases from the passages in the head. a

11, In, a torch, gas conducting tubes, a pivot stud rigidly attached to" said tubes,

said stud being provided" with circumferenv tial grooves-and assages connecting each tube with one of said grooves, a head having a bore v in which said stud is adapted to be mounted, said head being provided with a second-bore at an angle to said first bore and'said hea d' beingalso provided with passages leadingfromithe grooves in said pivot stud to'the interior of said second bore, and

a tip mounted in said second bore and receivmg gases from said last named passag s Signed at Pittsburgh, Penna. this 4th day of August 1913.

. JOSEPH o. GEHRING, JR.

RICHARD'D. CONRAD.

Witnesses; j

J no. L. OConnon, J. E. RoU'rLnY. 

